According to 1 John 1:7-10, the blood of Jesus cleanses us from sin by exposing sin for what it is and then calling us to no longer live in the way of sacred violence.

The blood of Jesus is not a spiritual antidote to sin which somehow removes the polluting presence of sin from our lives. Instead, the blood of Jesus exposes our sacred violence to us so that we can see in our own lives how we make scapegoat victims out of others, and then calls us to no longer live in this way.